Missing VS2005 Item Templates (er, most of 'em)

While at the Day of .NET, I discovered that I had an issue - my item templates were missing from Visual Studio (except for the PowerShell templates).  Interesting (and damned frustrating, too).  The first thing I did was shut down all devenv.exe, launch a VS command prompt and run devenv /installvstemplates.   Upon completion, I launch devenv to only be disappointed.  I had to run off to my session, and one thing led to another, so I didn't get back to it until tonight.   I had the genius (ha!) idea to uninstall the PowerShell templates.   This just consisted of deleting what was in C:\Users\<username>\Documents\Visual Studio 2005\Templates\ItemTemplates\Visual C#   and \Visual Basic  as well as C:\Users\<username>\Documents\Visual Studio 2005\Templates\ProjectTemplates\Visual C# and \Visual Basic.

 Voila!

Now, to figure out what happened so I can put my beloved PowerShell templates back.   It's rather late (0249, EDT), so I'm off to bed and more later as I sort this issue.